Method _updateDecal

Engine/source/lighting/common/projectedShadow.cpp:162–376

}

bool ProjectedShadow::_updateDecal( const SceneRenderState *state )
{
   PROFILE_SCOPE( ProjectedShadow_UpdateDecal );

   if ( !LIGHTMGR )
      return false;

   // Get the position of the decal first.   
   const Box3F &objBox = mParentObject->getObjBox();
   const Point3F boxCenter = objBox.getCenter();
   Point3F decalPos = boxCenter;
   const MatrixF &renderTransform = mParentObject->getRenderTransform();
   {
      // Set up the decal position.
      // We use the object space box center
      // multiplied by the render transform
      // of the object to ensure we benefit
      // from interpolation.
      MatrixF t( renderTransform );   
      t.setColumn(2,Point3F::UnitZ);
      t.mulP( decalPos );
   }

   if ( mDecalInstance )
   {
      mDecalInstance->mPosition = decalPos;
      if ( !shouldRender( state ) )
         return false;
   }

   // Get the sunlight for the shadow projection.
   // We want the LightManager to return NULL if it can't
   // get the "real" sun, so we specify false for the useDefault parameter.
   LightInfo *lights[4] = {0};
   LightQuery query;
   query.init( mParentObject->getWorldSphere() );
	query.getLights( lights, 4 );

   Point3F pos = renderTransform.getPosition();

   Point3F lightDir( 0, 0, 0 );
   Point3F tmp( 0, 0, 0 );
   F32 weight = 0;
   F32 range = 0;
   U32 lightCount = 0;
   F32 dist = 0;
   F32 fade = 0;
   for ( U32 i = 0; i < 4; i++ )
   {
      // If we got a NULL light, 
      // we're at the end of the list.
      if ( !lights[i] )
         break;

      if ( !lights[i]->getCastShadows() )
         continue;

      if ( lights[i]->getType() != LightInfo::Point )